src/network/__init__.py

@@ -14,7 +14,6 @@ def start(config, state):
     from .announcethread import AnnounceThread
     from network import connectionpool
     from .addrthread import AddrThread
-    from .dandelion import Dandelion
     from .downloadthread import DownloadThread
     from .invthread import InvThread
     from .networkthread import BMNetworkThread
@@ -23,8 +22,6 @@ def start(config, state):
     from .uploadthread import UploadThread
 
     readKnownNodes()
-    # init, needs to be early because other thread may access it early
-    state.Dandelion = Dandelion()
     connectionpool.pool.connectToStream(1)
     for thread in (
         BMNetworkThread(), InvThread(), AddrThread(),

src/network/bmobject.py

@@ -7,6 +7,7 @@ import time
 import protocol
 import state
 import network.connectionpool  # use long name to address recursive import
+import dandelion
 from highlevelcrypto import calculateInventoryHash
 
 logger = logging.getLogger('default')
@@ -112,7 +113,7 @@ class BMObject(object):  # pylint: disable=too-many-instance-attributes
         or advertise it unnecessarily)
         """
         # if it's a stem duplicate, pretend we don't have it
-        if state.Dandelion.hasHash(self.inventoryHash):
+        if dandelion.instance.hasHash(self.inventoryHash):
             return
         if self.inventoryHash in state.Inventory:
             raise BMObjectAlreadyHaveError()

src/network/bmproto.py

@@ -17,6 +17,7 @@ from network import knownnodes
 import protocol
 import state
 import network.connectionpool  # use long name to address recursive import
+import dandelion
 from bmconfigparser import config
 from queues import invQueue, objectProcessorQueue, portCheckerQueue
 from randomtrackingdict import RandomTrackingDict
@@ -350,27 +351,27 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             self.pendingUpload[i] = now
         return True
 
-    def _command_inv(self, dandelion=False):
+    def _command_inv(self, extend_dandelion_stem=False):
         """
         Common inv announce implementation:
-        both inv and dinv depending on *dandelion* kwarg
+        both inv and dinv depending on *extend_dandelion_stem* kwarg
         """
         items = self.decode_payload_content("l32s")
 
         if len(items) > protocol.MAX_OBJECT_COUNT:
             logger.error(
-                'Too many items in %sinv message!', 'd' if dandelion else '')
+                'Too many items in %sinv message!', 'd' if extend_dandelion_stem else '')
             raise BMProtoExcessiveDataError()
 
         # ignore dinv if dandelion turned off
-        if dandelion and not state.dandelion_enabled:
+        if extend_dandelion_stem and not state.dandelion_enabled:
             return True
 
         for i in items:
-            if i in state.Inventory and not state.Dandelion.hasHash(i):
+            if i in state.Inventory and not dandelion.instance.hasHash(i):
                 continue
-            if dandelion and not state.Dandelion.hasHash(i):
+            if extend_dandelion_stem and not dandelion.instance.hasHash(i):
-                state.Dandelion.addHash(i, self)
+                dandelion.instance.addHash(i, self)
             self.handleReceivedInventory(i)
 
         return True
@@ -436,9 +437,9 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             except KeyError:
                 pass
 
-        if self.object.inventoryHash in state.Inventory and state.Dandelion.hasHash(
+        if self.object.inventoryHash in state.Inventory and dandelion.instance.hasHash(
                 self.object.inventoryHash):
-            state.Dandelion.removeHash(
+            dandelion.instance.removeHash(
                 self.object.inventoryHash, "cycle detection")
 
         if six.PY2:

src/network/dandelion.py

@@ -194,3 +194,6 @@ class Dandelion:  # pylint: disable=old-style-class
             self.nodeMap = {}
             # hashMap stays to cater for pending stems
         self.refresh = time() + REASSIGN_INTERVAL
+
+
+instance = Dandelion()

src/network/downloadthread.py

@@ -10,6 +10,7 @@ import protocol
 from network import connectionpool
 from .objectracker import missingObjects
 from .threads import StoppableThread
+import dandelion
 
 
 class DownloadThread(StoppableThread):
@@ -60,7 +61,7 @@ class DownloadThread(StoppableThread):
                 payload = bytearray()
                 chunkCount = 0
                 for chunk in request:
-                    if chunk in state.Inventory and not state.Dandelion.hasHash(chunk):
+                    if chunk in state.Inventory and not dandelion.instance.hasHash(chunk):
                         try:
                             del i.objectsNewToMe[chunk]
                         except KeyError:

src/network/invthread.py

@@ -9,6 +9,7 @@ import addresses
 import protocol
 import state
 from network import connectionpool
+import dandelion
 from queues import invQueue
 from .threads import StoppableThread
 
@@ -39,10 +40,10 @@ class InvThread(StoppableThread):
     @staticmethod
     def handleLocallyGenerated(stream, hashId):
         """Locally generated inventory items require special handling"""
-        state.Dandelion.addHash(hashId, stream=stream)
+        dandelion.instance.addHash(hashId, stream=stream)
         for connection in connectionpool.pool.connections():
             if state.dandelion_enabled and connection != \
-                    state.Dandelion.objectChildStem(hashId):
+                    dandelion.instance.objectChildStem(hashId):
                 continue
             connection.objectsNewToThem[hashId] = time()
 
@@ -51,7 +52,7 @@ class InvThread(StoppableThread):
             chunk = []
             while True:
                 # Dandelion fluff trigger by expiration
-                handleExpiredDandelion(state.Dandelion.expire())
+                handleExpiredDandelion(dandelion.instance.expire())
                 try:
                     data = invQueue.get(False)
                     chunk.append((data[0], data[1]))
@@ -74,7 +75,7 @@ class InvThread(StoppableThread):
                         except KeyError:
                             continue
                         try:
-                            if connection == state.Dandelion.objectChildStem(inv[1]):
+                            if connection == dandelion.instance.objectChildStem(inv[1]):
                                 # Fluff trigger by RNG
                                 # auto-ignore if config set to 0, i.e. dandelion is off
                                 if random.randint(1, 100) >= state.dandelion_enabled:  # nosec B311
@@ -104,7 +105,7 @@ class InvThread(StoppableThread):
             for _ in range(len(chunk)):
                 invQueue.task_done()
 
-            if state.Dandelion.refresh < time():
+            if dandelion.instance.refresh < time():
-                state.Dandelion.reRandomiseStems()
+                dandelion.instance.reRandomiseStems()
 
             self.stop.wait(1)

src/network/objectracker.py

@@ -5,8 +5,8 @@ import time
 from threading import RLock
 import six
 
-import state
 import network.connectionpool  # use long name to address recursive import
+import dandelion
 from randomtrackingdict import RandomTrackingDict
 
 haveBloom = False
@@ -111,14 +111,14 @@ class ObjectTracker(object):
                 del i.objectsNewToMe[hashid]
             except KeyError:
                 if streamNumber in i.streams and (
-                        not state.Dandelion.hasHash(hashid)
+                        not dandelion.instance.hasHash(hashid)
-                        or state.Dandelion.objectChildStem(hashid) == i):
+                        or dandelion.instance.objectChildStem(hashid) == i):
                     with i.objectsNewToThemLock:
                         i.objectsNewToThem[hashid_bytes] = time.time()
                     # update stream number,
                     # which we didn't have when we just received the dinv
                     # also resets expiration of the stem mode
-                    state.Dandelion.setHashStream(hashid, streamNumber)
+                    dandelion.instance.setHashStream(hashid, streamNumber)
 
             if i == self:
                 try:

src/network/tcp.py

@@ -17,6 +17,7 @@ import l10n
 import protocol
 import state
 import network.connectionpool  # use long name to address recursive import
+import dandelion
 from bmconfigparser import config
 from highlevelcrypto import randomBytes
 from queues import invQueue, receiveDataQueue, UISignalQueue
@@ -175,7 +176,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             knownnodes.increaseRating(self.destination)
             knownnodes.addKnownNode(
                 self.streams, self.destination, time.time())
-            state.Dandelion.maybeAddStem(self)
+            dandelion.instance.maybeAddStem(self)
         self.sendAddr()
         self.sendBigInv()
 
@@ -237,7 +238,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             with self.objectsNewToThemLock:
                 for objHash in state.Inventory.unexpired_hashes_by_stream(stream):
                     # don't advertise stem objects on bigInv
-                    if state.Dandelion.hasHash(objHash):
+                    if dandelion.instance.hasHash(objHash):
                         continue
                     bigInvList[objHash] = 0
         objectCount = 0
@@ -299,7 +300,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             if host_is_global:
                 knownnodes.addKnownNode(
                     self.streams, self.destination, time.time())
-                state.Dandelion.maybeRemoveStem(self)
+                dandelion.instance.maybeRemoveStem(self)
         else:
             self.checkTimeOffsetNotification()
             if host_is_global:

src/network/uploadthread.py

@@ -7,6 +7,7 @@ import helper_random
 import protocol
 import state
 from network import connectionpool
+import dandelion
 from randomtrackingdict import RandomTrackingDict
 from .threads import StoppableThread
 
@@ -40,8 +41,8 @@ class UploadThread(StoppableThread):
                 chunk_count = 0
                 for chunk in request:
                     del i.pendingUpload[chunk]
-                    if state.Dandelion.hasHash(chunk) and \
+                    if dandelion.instance.hasHash(chunk) and \
-                       i != state.Dandelion.objectChildStem(chunk):
+                       i != dandelion.instance.objectChildStem(chunk):
                         i.antiIntersectionDelay()
                         self.logger.info(
                             '%s asked for a stem object we didn\'t offer to it.',

src/state.py

@@ -96,6 +96,3 @@ class Placeholder(object):  # pylint:disable=too-few-public-methods
 
 
 Inventory = Placeholder("Inventory")
-
-
-Dandelion = Placeholder("Dandelion")